Nokia Lumia 1520 AT&T Unlocked 4G LTE Windows 8 GSM Smartphone - Black & White 4G-LTE Bands 2, 4, 5, 7 and 17, 4G HSPA+ with enhanced backhaul Rear-facing camera 20MP autofocus, OIS, ZEISS optics and dual LED flash 3G - UMTS 850/900/1900/2100MHz, GSM/GPRS/EDGE 850/900/1800/1900MHz Qualcomm Snapdragon 800 with Adreno 330 GPU Internal memory storage Up to 16GB